Question

A hardware store charges a $30 rental fee and $15 per

day to rent a power washer. Which equation correctly
relates the total cost y to rent the washer for x days?
A
y = 15 + 30x
C
D
y = 30 - 15
y =
B
y = 30 + 15x

Answer 1

30 is an one-time payment.

The rest cost depends on the number of days (x): 15 · x = 15x

The total cost is a sum of above values, so the answer is y = 30 + 15x.

Answer 2

The answer is B with the equation of y=15x +30 because the rental fee is a one time payment as for the $15 is charged multiple times per day